<?php // $Id: search.php,v 1.49.2.8 2008/12/11 10:47:57 tjhunt Exp $

/// Displays external information about a course

	require_once("../config.php");
	require_once("lib.php");

	$search	= optional_param('search', '', PARAM_RAW);  // search words
	$page	  = optional_param('page', 0, PARAM_INT);	 // which page to show
	$perpage   = optional_param('perpage', 10, PARAM_INT); // how many per page
	$moveto	= optional_param('moveto', 0, PARAM_INT);   // move to category
	$edit	  = optional_param('edit', -1, PARAM_BOOL);
	$hide	  = optional_param('hide', 0, PARAM_INT);
	$show	  = optional_param('show', 0, PARAM_INT);
	$blocklist = optional_param('blocklist', 0, PARAM_INT);
	$modulelist= optional_param('modulelist', '', PARAM_ALPHAEXT);

	$search = trim(strip_tags($search)); // trim & clean raw searched string

	if ($search) {
		$searchterms = explode(" ", $search);	// Search for words independently
		foreach ($searchterms as $key => $searchterm) {
			if (strlen($searchterm) < 2) {
				unset($searchterms[$key]);
			}
		}
		$search = trim(implode(" ", $searchterms));
	}

	$site = get_site();

	if ($CFG->forcelogin) {
		require_login();
	}

	if (update_category_button()) {
		if ($edit !== -1) {
			$USER->categoryediting = $edit;
		}
		$adminediting = !empty($USER->categoryediting);
	} else {
		$adminediting = false;
	}

/// Editing functions
	if (has_capability('moodle/course:visibility', get_context_instance(CONTEXT_SYSTEM))) {
	/// Hide or show a course
		if ($hide or $show and confirm_sesskey()) {
			if ($hide) {
				$course = get_record("course", "id", $hide);
				$visible = 0;
			} else {
				$course = get_record("course", "id", $show);
				$visible = 1;
			}
			if ($course) {
				if (! set_field("course", "visible", $visible, "id", $course->id)) {
					notify("Could not update that course!");
				}
			}
		}
	}

	if (has_capability('moodle/course:create', get_context_instance(CONTEXT_SYSTEM)) && $perpage != 99999) {
		$perpage = 30;
	}

	$displaylist = array();
	$parentlist = array();
	make_categories_list($displaylist, $parentlist);

	$strcourses = get_string("courses");
	$strsearch = get_string("search");
	$strsearchresults = get_string("searchresults");
	$strcategory = get_string("category");
	$strselect   = get_string("select");
	$strselectall = get_string("selectall");
	$strdeselectall = get_string("deselectall");
	$stredit = get_string("edit");
	$strfrontpage = get_string('frontpage', 'admin');
	$strnovalidcourses = get_string('novalidcourses');

	if (empty($search) and empty($blocklist) and empty($modulelist)) {
		$navlinks = array();
		$navlinks[] = array('name' => $strcourses, 'link' => "index.php", 'type' => 'misc');
		$navlinks[] = array('name' => $strsearch, 'link' => null, 'type' => 'misc');
		$navigation = build_navigation($navlinks);

		print_header("$site->fullname : $strsearch", $site->fullname, $navigation, "", "");
		print_simple_box_start("center");
		echo "<center>";
		echo "<br />";
		print_course_search("", false, "plain");
		echo "<br /><p>";
		print_string("searchhelp");
		echo "</p>";
		echo "</center>";
		print_simple_box_end();
		print_footer();
		exit;
	}

	if (!empty($moveto) and $data = data_submitted() and confirm_sesskey()) {   // Some courses are being moved
		if (! $destcategory = get_record("course_categories", "id", $data->moveto)) {
			error("Error finding the category");
		}

		$courses = array();
		foreach ( $data as $key => $value ) {
			if (preg_match('/^c\d+$/', $key)) {
				array_push($courses, substr($key, 1));
			}
		}
		move_courses($courses, $data->moveto);
	}

	// get list of courses containing blocks if required
	if (!empty($blocklist) and confirm_sesskey()) {
		$blockid = $blocklist;
		if (!$blocks = get_records('block_instance', 'blockid', $blockid)) {
			error( "Could not read data for blockid=$blockid" );
		}

		// run through blocks and get (unique) courses
		$courses = array();
		foreach ($blocks as $block) {
			$courseid = $block->pageid;
			// MDL-11167, blocks can be placed on mymoodle, or the blogs page
			// and it should not show up on course search page
			if ($courseid==0 || $block->pagetype != 'course-view') {
				continue;
			}
			if (!$course = get_record('course', 'id', $courseid)) {
				error( "Could not read data for courseid=$courseid" );
			}
			$courses[$courseid] = $course;
		}
		$totalcount = count( $courses );
	}
	// get list of courses containing modules if required
	elseif (!empty($modulelist) and confirm_sesskey()) {
		$modulename = $modulelist;

		$sql =  "SELECT DISTINCT c.id FROM {$CFG->prefix}".$modulelist." module, {$CFG->prefix}course c"
			." WHERE module.course=c.id";

		$courseids = get_records_sql($sql);

		$courses = array();
		if (!empty($courseids)) {
			$firstcourse = $page*$perpage;
			$lastcourse = $page*$perpage + $perpage -1;
			$i = 0;
			foreach ($courseids as $courseid) {
				if ($i>= $firstcourse && $i<=$lastcourse) {
					$courses[$courseid->id] = get_record('course', 'id', $courseid->id);
				}
				$i++;
			}
			$totalcount = count($courseids);
		}
		else {
			$totalcount = 0;
		}
	}
	else {
		$courses = get_courses_search($searchterms, "fullname ASC",
			$page, $perpage, $totalcount);
	}

	$searchform = print_course_search($search, true, "navbar");

	if (!empty($courses) && has_capability('moodle/course:create', get_context_instance(CONTEXT_SYSTEM))) {
		$searchform .= update_categories_search_button($search,$page,$perpage);
	}

	$navlinks = array();
	$navlinks[] = array('name' => $strcourses, 'link' => 'index.php', 'type' => 'misc');
	$navlinks[] = array('name' => $strsearch, 'link' => 'search.php', 'type' => 'misc');
	$navlinks[] = array('name' => "'".s($search, true)."'", 'link' => null, 'type' => 'misc');
	$navigation = build_navigation($navlinks);

	print_header("$site->fullname : $strsearchresults", $site->fullname, $navigation, "", "", "", $searchform);

	$lastcategory = -1;
	if ($courses) {
		print_heading("$strsearchresults: $totalcount");
		$encodedsearch = urlencode(stripslashes($search));

	///add the module parameter to the paging bar if they exists
		$modulelink = "";
		if (!empty($modulelist) and confirm_sesskey()) {
			$modulelink = "&amp;modulelist=".$modulelist."&amp;sesskey=".$USER->sesskey;
		}

		print_navigation_bar($totalcount, $page, $perpage, $encodedsearch, $modulelink);

		if (!$adminediting) {
		/// Show browse view.
			foreach ($courses as $course) {
				$course->summary .= "<br /><p class=\"category\">";
				$course->summary .= "$strcategory: <a href=\"category.php?id=$course->category\">";
				$course->summary .= $displaylist[$course->category];
				$course->summary .= "</a></p>";
				print_course($course, $search);
				print_spacer(5,5);
			}
		} else {
		/// Show editing UI.
			echo "<form id=\"movecourses\" action=\"search.php\" method=\"post\">\n";
			echo "<div><input type=\"hidden\" name=\"sesskey\" value=\"$USER->sesskey\" />\n";
			echo "<input type=\"hidden\" name=\"search\" value=\"".s($search, true)."\" />\n";
			echo "<input type=\"hidden\" name=\"page\" value=\"$page\" />\n";
			echo "<input type=\"hidden\" name=\"perpage\" value=\"$perpage\" /></div>\n";
			echo "<table border=\"0\" cellspacing=\"2\" cellpadding=\"4\" class=\"generalbox boxaligncenter\">\n<tr>\n";
			echo "<th scope=\"col\">$strcourses</th>\n";
			echo "<th scope=\"col\">$strcategory</th>\n";
			echo "<th scope=\"col\">$strselect</th>\n";
			echo "<th scope=\"col\">$stredit</th></tr>\n";

			foreach ($courses as $course) {

				if (isset($course->context)) {
					$coursecontext = $course->context;
				} else {
					$coursecontext = get_context_instance(CONTEXT_COURSE, $course->id);
				}

				$linkcss = $course->visible ? "" : " class=\"dimmed\" ";

				// are we displaying the front page (courseid=1)?
				if ($course->id == 1) {
					echo "<tr>\n";
					echo "<td><a href=\"$CFG->wwwroot\">$strfrontpage</a></td>\n";

					// can't do anything else with the front page
					echo "  <td>&nbsp;</td>\n"; // category place
					echo "  <td>&nbsp;</td>\n"; // select place
					echo "  <td>&nbsp;</td>\n"; // edit place
					echo "</tr>\n";
					continue;
				}

				echo "<tr>\n";
				echo "<td><a $linkcss href=\"view.php?id=$course->id\">"
					. highlight($search, format_string($course->fullname)) . "</a></td>\n";
				echo "<td>".$displaylist[$course->category]."</td>\n";
				echo "<td>\n";

				// this is ok since this will get inherited from course category context
				// if it is set
				if (has_capability('moodle/category:manage', $coursecontext)) {
					echo "<input type=\"checkbox\" name=\"c$course->id\" />\n";
				} else {
					echo "<input type=\"checkbox\" name=\"c$course->id\" disabled=\"disabled\" />\n";
				}

				echo "</td>\n";
				echo "<td>\n";
				$pixpath = $CFG->pixpath;

				// checks whether user can update course settings
				if (has_capability('moodle/course:update', $coursecontext)) {
					echo "<a title=\"".get_string("settings")."\" href=\"$CFG->wwwroot/course/edit.php?id=$course->id\">\n<img".
						" src=\"$pixpath/t/edit.gif\" class=\"iconsmall\" alt=\"".get_string("settings")."\" /></a>\n ";
				}

				// checks whether user can do role assignment
				if (has_capability('moodle/role:assign', $coursecontext)) {
					echo'<a title="'.get_string('assignroles', 'role').'" href="'.$CFG->wwwroot.'/'.$CFG->admin.'/roles/assign.php?contextid='.$coursecontext->id.'">';
					echo '<img src="'.$CFG->pixpath.'/i/roles.gif" class="iconsmall" alt="'.get_string('assignroles', 'role').'" /></a> ' . "\n";
				}

				// checks whether user can delete course
				if (has_capability('moodle/course:delete', $coursecontext)) {
					echo "<a title=\"".get_string("delete")."\" href=\"delete.php?id=$course->id\">\n<img".
						" src=\"$pixpath/t/delete.gif\" class=\"iconsmall\" alt=\"".get_string("delete")."\" /></a>\n ";
				}

				// checks whether user can change visibility
				if (has_capability('moodle/course:visibility', $coursecontext)) {
					if (!empty($course->visible)) {
						echo "<a title=\"".get_string("hide")."\" href=\"search.php?search=$encodedsearch&amp;perpage=$perpage&amp;page=$page&amp;hide=$course->id&amp;sesskey=$USER->sesskey\">\n<img".
							" src=\"$pixpath/t/hide.gif\" class=\"iconsmall\" alt=\"".get_string("hide")."\" /></a>\n ";
					} else {
						echo "<a title=\"".get_string("show")."\" href=\"search.php?search=$encodedsearch&amp;perpage=$perpage&amp;page=$page&amp;show=$course->id&amp;sesskey=$USER->sesskey\">\n<img".
							" src=\"$pixpath/t/show.gif\" class=\"iconsmall\" alt=\"".get_string("show")."\" /></a>\n ";
					}
				}

				// checks whether user can do site backup
				if (has_capability('moodle/site:backup', $coursecontext)) {
					echo "<a title=\"".get_string("backup")."\" href=\"../backup/backup.php?id=$course->id\">\n<img".
						" src=\"$pixpath/t/backup.gif\" class=\"iconsmall\" alt=\"".get_string("backup")."\" /></a>\n ";
				}

				// checks whether user can do restore
				if (has_capability('moodle/site:restore', $coursecontext)) {
					echo "<a title=\"".get_string("restore")."\" href=\"../files/index.php?id=$course->id&amp;wdir=/backupdata\">\n<img".
						" src=\"$pixpath/t/restore.gif\" class=\"iconsmall\" alt=\"".get_string("restore")."\" /></a>\n ";
				}

				echo "</td>\n</tr>\n";
			}
			echo "<tr>\n<td colspan=\"4\" style=\"text-align:center\">\n";
			echo "<br />";
			echo "<input type=\"button\" onclick=\"checkall()\" value=\"$strselectall\" />\n";
			echo "<input type=\"button\" onclick=\"uncheckall()\" value=\"$strdeselectall\" />\n";
			choose_from_menu ($displaylist, "moveto", "", get_string("moveselectedcoursesto"), "javascript: getElementById('movecourses').submit()");
			echo "</td>\n</tr>\n";
			echo "</table>\n</form>";

		}

		print_navigation_bar($totalcount,$page,$perpage,$encodedsearch,$modulelink);

	} else {
		if (!empty($search)) {
			print_heading(get_string("nocoursesfound", "", s($search, true)));
		}
		else {
			print_heading( $strnovalidcourses );
		}
	}

	echo "<br /><br />";

	print_course_search($search);

	print_footer();

	/**
	 * Print a list navigation bar
	 * Display page numbers, and a link for displaying all entries
	 * @param integer $totalcount - number of entry to display
	 * @param integer $page - page number
	 * @param integer $perpage - number of entry per page
	 * @param string $encodedsearch
	 * @param string $modulelink - module name
	 */
	function print_navigation_bar($totalcount,$page,$perpage,$encodedsearch,$modulelink) {
		print_paging_bar($totalcount, $page, $perpage, "search.php?search=$encodedsearch".$modulelink."&amp;perpage=$perpage&amp;",'page',($perpage == 99999));

		//display
		if ($perpage != 99999 && $totalcount > $perpage) {
			echo "<center><p>";
			echo "<a href=\"search.php?search=$encodedsearch".$modulelink."&amp;perpage=99999\">".get_string("showall", "", $totalcount)."</a>";
			echo "</p></center>";
		}
	}

?>
